Differentiate between

a. Grazing food chain and Detritus food chain

b. Gross primary productivity and Net primary productivity

How does human insulin formed using rDNA technique?

What are selectable markers? Give two example.

Arrange the following steps of decomposition in a sequential order: Catabolism, Leaching, Mineralisation, Humification and Fragmentation.

Write the appropriate method for disposals of e-waste.